-
Notifications
You must be signed in to change notification settings - Fork 0
/
index.html
3222 lines (1128 loc) · 97 KB
/
index.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<!DOCTYPE html>
<html class="theme-next pisces use-motion" lang="en">
<head>
<meta charset="UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=2"/>
<meta name="theme-color" content="#222"/>
<link rel="stylesheet" href="/lib/font-awesome/css/font-awesome.min.css?v=4.6.2"/>
<link rel="stylesheet" href="/css/main.css?v=7.0.1"/>
<link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon-next.png?v=7.0.1">
<link rel="icon" type="image/png" sizes="32x32" href="/images/favicon-32x32-next.png?v=7.0.1">
<link rel="icon" type="image/png" sizes="16x16" href="/images/favicon-16x16-next.png?v=7.0.1">
<link rel="mask-icon" href="/images/logo.svg?v=7.0.1" color="#222">
<script id="hexo.configurations">
var NexT = window.NexT || {};
var CONFIG = {
root: '/',
scheme: 'Pisces',
version: '7.0.1',
sidebar: {"position":"left","display":"post","offset":12,"onmobile":false,"dimmer":false},
back2top: true,
back2top_sidebar: false,
fancybox: false,
fastclick: false,
lazyload: false,
tabs: true,
motion: {"enable":true,"async":false,"transition":{"post_block":"fadeIn","post_header":"slideDownIn","post_body":"slideDownIn","coll_header":"slideLeftIn","sidebar":"slideUpIn"}},
algolia: {
applicationID: '',
apiKey: '',
indexName: '',
hits: {"per_page":10},
labels: {"input_placeholder":"Search for Posts","hits_empty":"We didn't find any results for the search: ${query}","hits_stats":"${hits} results found in ${time} ms"}
}
};
</script>
<meta name="description" content="kubernetes/SDN/DevOps">
<meta property="og:type" content="website">
<meta property="og:title" content="Hwchiu Learning Note">
<meta property="og:url" content="https://www.hwchiu.com/page/11/index.html">
<meta property="og:site_name" content="Hwchiu Learning Note">
<meta property="og:description" content="kubernetes/SDN/DevOps">
<meta property="og:locale" content="en">
<meta name="twitter:card" content="summary">
<meta name="twitter:title" content="Hwchiu Learning Note">
<meta name="twitter:description" content="kubernetes/SDN/DevOps">
<link rel="alternate" href="/atom.xml" title="Hwchiu Learning Note" type="application/atom+xml"/>
<link rel="canonical" href="https://www.hwchiu.com/page/11/"/>
<script id="page.configurations">
CONFIG.page = {
sidebar: "",
};
</script>
<title> - Hwchiu Learning Notekubernetes/SDN/DevOps </title>
<script>
window.fbAsyncInit = function() {
FB.init({
appId : '',
xfbml : true,
version: 'v2.10'
});
};
(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) {return;}
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en/sdk.js";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
</script>
<script async src="//www.googletagmanager.com/gtag/js?id=UA-54006186-1"></script>
<script>
var host = window.location.hostname;
if (host !== "localhost" || !true) {
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'UA-54006186-1');
}
</script>
<noscript>
<style>
.use-motion .motion-element,
.use-motion .brand,
.use-motion .menu-item,
.sidebar-inner,
.use-motion .post-block,
.use-motion .pagination,
.use-motion .comments,
.use-motion .post-header,
.use-motion .post-body,
.use-motion .collection-title { opacity: initial; }
.use-motion .logo,
.use-motion .site-title,
.use-motion .site-subtitle {
opacity: initial;
top: initial;
}
.use-motion .logo-line-before i { left: initial; }
.use-motion .logo-line-after i { right: initial; }
</style>
</noscript>
<script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<script>
(adsbygoogle = window.adsbygoogle || []).push({
google_ad_client: "ca-pub-1100711228720990",
enable_page_level_ads: true
});
</script>
</head>
<body itemscope itemtype="http://schema.org/WebPage" lang="en">
<div class="container sidebar-position-left
page-home">
<div class="headband"></div>
<header id="header" class="header" itemscope itemtype="http://schema.org/WPHeader">
<div class="header-inner"><div class="site-brand-wrapper">
<div class="site-meta">
<div class="custom-logo-site-title">
<a href="/" class="brand" rel="start">
<span class="logo-line-before"><i></i></span>
<span class="site-title">Hwchiu Learning Note</span>
<span class="logo-line-after"><i></i></span>
</a>
</div>
<h1 class="site-subtitle" itemprop="description">kubernetes, sdn, linux,devops</h1>
</div>
<div class="site-nav-toggle">
<button aria-label="Toggle navigation bar">
<span class="btn-bar"></span>
<span class="btn-bar"></span>
<span class="btn-bar"></span>
</button>
</div>
</div>
<nav class="site-nav">
<ul id="menu" class="menu">
<li class="menu-item menu-item-home">
<a href="/" rel="section"><i class="menu-item-icon fa fa-fw fa-home"></i> <br/>Home</a>
</li>
<li class="menu-item menu-item-about">
<a href="/about/" rel="section"><i class="menu-item-icon fa fa-fw fa-user"></i> <br/>About</a>
</li>
<li class="menu-item menu-item-tags">
<a href="/tags/" rel="section"><i class="menu-item-icon fa fa-fw fa-tags"></i> <br/>Tags</a>
</li>
<li class="menu-item menu-item-archives">
<a href="/archives/" rel="section"><i class="menu-item-icon fa fa-fw fa-archive"></i> <br/>Archives</a>
</li>
<li class="menu-item menu-item-sitemap">
<a href="/sitemap.xml" rel="section"><i class="menu-item-icon fa fa-fw fa-sitemap"></i> <br/>Sitemap</a>
</li>
</ul>
</nav>
</div>
</header>
<a href="https://github.com/hwchiu" class="github-corner" title="Follow me on GitHub" aria-label="Follow me on GitHub" rel="noopener" target="_blank"><svg width="80" height="80" viewBox="0 0 250 250" style="fill: #222; color: #fff; position: absolute; top: 0; border: 0; right: 0;" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a>
<main id="main" class="main">
<div class="main-inner">
<div class="content-wrap">
<div id="content" class="content">
<section id="posts" class="posts-expand">
<article class="post post-type-normal" itemscope itemtype="http://schema.org/Article">
<div class="post-block">
<link itemprop="mainEntityOfPage" href="https://www.hwchiu.com/openvswitch-overview.html"/>
<span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
<meta itemprop="name" content="Hwchiu"/>
<meta itemprop="description" content="kubernetes/SDN/DevOps"/>
<meta itemprop="image" content="/images/avatar.jpg"/>
</span>
<span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
<meta itemprop="name" content="Hwchiu Learning Note"/>
</span>
<header class="post-header">
<h2 class="post-title" itemprop="name headline">
<a href="/openvswitch-overview.html" class="post-title-link" itemprop="url">OpenvSwitch - overview</a>
</h2>
<div class="post-meta">
<span class="post-time">
<span class="post-meta-item-icon">
<i class="fa fa-calendar-o"></i>
</span>
<span class="post-meta-item-text">Posted on</span>
<time title="Created: 2013-12-17 15:13:00" itemprop="dateCreated datePublished" datetime="2013-12-17T15:13:00+00:00">2013-12-17</time>
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-calendar-check-o"></i>
</span>
<span class="post-meta-item-text">Edited on</span>
<time title="Modified: 2018-09-16 01:33:25" itemprop="dateModified" datetime="2018-09-16T01:33:25+00:00">2018-09-16</time>
</span>
<span class="post-comments-count">
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-comment-o"></i>
</span>
<span class="post-meta-item-text">Comments: </span>
<a href="/openvswitch-overview.html#comments" itemprop="discussionUrl">
<span class="post-comments-count disqus-comment-count" data-disqus-identifier="openvswitch-overview.html" itemprop="commentCount"></span>
</a>
</span>
</div>
</header>
<div class="post-body" itemprop="articleBody">
This post shoes about what the system do when we install the OpenvSwitch in your system. The architecture of OpenvSwitch covers both user-space and kernel-space and we can see functions of each part in this porsts.
<!--noindex-->
<div class="post-button text-center">
<a class="btn" href="/openvswitch-overview.html">
Read more »
</a>
</div>
<!--/noindex-->
</div>
<div class="popular-posts-header">Related Posts</div>
<ul class="popular-posts">
<li class="popular-posts-item">
<div class="popular-posts-title"><a href="/binomial-heap.html" rel="bookmark">Binomial Heap</a></div>
</li>
<li class="popular-posts-item">
<div class="popular-posts-title"><a href="/openvswitch-2.html" rel="bookmark">Openvswitch source code(1)</a></div>
</li>
<li class="popular-posts-item">
<div class="popular-posts-title"><a href="/openvswitch-3.html" rel="bookmark">OpenvSwitch source code(2)</a></div>
</li>
<li class="popular-posts-item">
<div class="popular-posts-title"><a href="/openvswitch-bonding.html" rel="bookmark">Understanding the OpenvSwitch Bonding</a></div>
</li>
<li class="popular-posts-item">
<div class="popular-posts-title"><a href="/openvswitch-hmap.html" rel="bookmark">OpenvSwitch - hmap</a></div>
</li>
</ul>
<footer class="post-footer">
<div class="post-eof"></div>
</footer>
</div>
</article>
<article class="post post-type-normal" itemscope itemtype="http://schema.org/Article">
<div class="post-block">
<link itemprop="mainEntityOfPage" href="https://www.hwchiu.com/openvswitch-3.html"/>
<span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
<meta itemprop="name" content="Hwchiu"/>
<meta itemprop="description" content="kubernetes/SDN/DevOps"/>
<meta itemprop="image" content="/images/avatar.jpg"/>
</span>
<span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
<meta itemprop="name" content="Hwchiu Learning Note"/>
</span>
<header class="post-header">
<h2 class="post-title" itemprop="name headline">
<a href="/openvswitch-3.html" class="post-title-link" itemprop="url">OpenvSwitch source code(2)</a>
</h2>
<div class="post-meta">
<span class="post-time">
<span class="post-meta-item-icon">
<i class="fa fa-calendar-o"></i>
</span>
<span class="post-meta-item-text">Posted on</span>
<time title="Created: 2013-12-13 09:18:00" itemprop="dateCreated datePublished" datetime="2013-12-13T09:18:00+00:00">2013-12-13</time>
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-calendar-check-o"></i>
</span>
<span class="post-meta-item-text">Edited on</span>
<time title="Modified: 2018-09-17 07:04:19" itemprop="dateModified" datetime="2018-09-17T07:04:19+00:00">2018-09-17</time>
</span>
<span class="post-comments-count">
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-comment-o"></i>
</span>
<span class="post-meta-item-text">Comments: </span>
<a href="/openvswitch-3.html#comments" itemprop="discussionUrl">
<span class="post-comments-count disqus-comment-count" data-disqus-identifier="openvswitch-3.html" itemprop="commentCount"></span>
</a>
</span>
</div>
</header>
<div class="post-body" itemprop="articleBody">
這篇文章中，我們決定透過閱讀原始碼的方式，來瞭解 OpenvSwitch 操作上最常使用的指令，也就是 add-port 這個指令每次運行時，整個系統到底怎麼運行的。藉由閱讀原始碼的方式來釐清整個 OpenvSwitch 的架構，從 User-space 的程序到 Kerenel Space 的 Module, 這中間到底是怎麼處理的。
<!--noindex-->
<div class="post-button text-center">
<a class="btn" href="/openvswitch-3.html">
Read more »
</a>
</div>
<!--/noindex-->
</div>
<div class="popular-posts-header">Related Posts</div>
<ul class="popular-posts">
<li class="popular-posts-item">
<div class="popular-posts-title"><a href="/openvswitch-source-code3.html" rel="bookmark">OpenvSwitch source code(3)</a></div>
</li>
<li class="popular-posts-item">
<div class="popular-posts-title"><a href="/openvswitch-source-2.html" rel="bookmark">OpenvSwitch - 2</a></div>
</li>
<li class="popular-posts-item">
<div class="popular-posts-title"><a href="/openvswitch-hmap.html" rel="bookmark">OpenvSwitch - hmap</a></div>
</li>
<li class="popular-posts-item">
<div class="popular-posts-title"><a href="/openvswitch-2.html" rel="bookmark">Openvswitch source code(1)</a></div>
</li>
<li class="popular-posts-item">
<div class="popular-posts-title"><a href="/binomial-heap.html" rel="bookmark">Binomial Heap</a></div>
</li>
</ul>
<footer class="post-footer">
<div class="post-eof"></div>
</footer>
</div>
</article>
<article class="post post-type-normal" itemscope itemtype="http://schema.org/Article">
<div class="post-block">
<link itemprop="mainEntityOfPage" href="https://www.hwchiu.com/openvswitch-source-2.html"/>
<span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
<meta itemprop="name" content="Hwchiu"/>
<meta itemprop="description" content="kubernetes/SDN/DevOps"/>
<meta itemprop="image" content="/images/avatar.jpg"/>
</span>
<span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
<meta itemprop="name" content="Hwchiu Learning Note"/>
</span>
<header class="post-header">
<h2 class="post-title" itemprop="name headline">
<a href="/openvswitch-source-2.html" class="post-title-link" itemprop="url">OpenvSwitch - 2</a>
</h2>
<div class="post-meta">
<span class="post-time">
<span class="post-meta-item-icon">
<i class="fa fa-calendar-o"></i>
</span>
<span class="post-meta-item-text">Posted on</span>
<time title="Created: 2013-12-09 10:03:00" itemprop="dateCreated datePublished" datetime="2013-12-09T10:03:00+00:00">2013-12-09</time>
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-calendar-check-o"></i>
</span>
<span class="post-meta-item-text">Edited on</span>
<time title="Modified: 2018-09-24 01:59:57" itemprop="dateModified" datetime="2018-09-24T01:59:57+00:00">2018-09-24</time>
</span>
<span class="post-comments-count">
<span class="post-meta-divider">|</span>
<span class="post-meta-item-icon">
<i class="fa fa-comment-o"></i>
</span>
<span class="post-meta-item-text">Comments: </span>
<a href="/openvswitch-source-2.html#comments" itemprop="discussionUrl">
<span class="post-comments-count disqus-comment-count" data-disqus-identifier="openvswitch-source-2.html" itemprop="commentCount"></span>
</a>
</span>
</div>
</header>
<div class="post-body" itemprop="articleBody">
<p>ovs-vsctl add-port br eth1<br>(netlink)</p>
<p>kernel side:</p>
<ul>
<li>Register a generic netlink</li>
<li>Call function when receive command by netlink from userspace (ovs-vsctl)</li>
<li>Use the interface name to get the net_device</li>
<li>Register the send and receive event handler.</li>
</ul>
<p><strong>Register generic netlink</strong><br><figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">static</span> <span class="class"><span class="keyword">struct</span> <span class="title">genl_ops</span> <span class="title">dp_vport_genl_ops</span>[] = {</span></span><br><span class="line"> { .cmd = OVS_VPORT_CMD_NEW,</span><br><span class="line"> .flags = GENL_ADMIN_PERM, <span class="comment">/* Requires CAP_NET_ADMIN privilege. */</span></span><br><span class="line"> .policy = vport_policy,</span><br><span class="line"> .doit = ovs_vport_cmd_new</span><br><span class="line"> },</span><br><span class="line"> { .cmd = OVS_VPORT_CMD_DEL,</span><br><span class="line"> .flags = GENL_ADMIN_PERM, <span class="comment">/* Requires CAP_NET_ADMIN privilege. */</span></span><br><span class="line"> .policy = vport_policy,</span><br><span class="line"> .doit = ovs_vport_cmd_del</span><br><span class="line"> },</span><br><span class="line"> { .cmd = OVS_VPORT_CMD_GET,</span><br><span class="line"> .flags = <span class="number">0</span>, <span class="comment">/* OK for unprivileged users. */</span></span><br><span class="line"> .policy = vport_policy,</span><br><span class="line"> .doit = ovs_vport_cmd_get,</span><br><span class="line"> .dumpit = ovs_vport_cmd_dump</span><br><span class="line"> },</span><br><span class="line"> { .cmd = OVS_VPORT_CMD_SET,</span><br><span class="line"> .flags = GENL_ADMIN_PERM, <span class="comment">/* Requires CAP_NET_ADMIN privilege. */</span></span><br><span class="line"> .policy = vport_policy,</span><br><span class="line"> .doit = ovs_vport_cmd_set,</span><br><span class="line"> },</span><br><span class="line">};</span><br></pre></td></tr></table></figure></p>
<ul>
<li>從netlink收到 <strong>OVS_VPORT_CMD_NEW</strong>的cmd時，就會執行 <strong>ovs_vport_cmd_new</strong></li>
</ul>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">static</span> <span class="keyword">int</span> <span class="title">ovs_vport_cmd_new</span><span class="params">(struct sk_buff *skb, struct genl_info *info)</span></span></span><br><span class="line"><span class="function"></span>{</span><br><span class="line"> <span class="class"><span class="keyword">struct</span> <span class="title">nlattr</span> **<span class="title">a</span> = <span class="title">info</span>-><span class="title">attrs</span>;</span></span><br><span class="line"> <span class="class"><span class="keyword">struct</span> <span class="title">ovs_header</span> *<span class="title">ovs_header</span> = <span class="title">info</span>-><span class="title">userhdr</span>;</span></span><br><span class="line"> <span class="class"><span class="keyword">struct</span> <span class="title">vport_parms</span> <span class="title">parms</span>;</span></span><br><span class="line"> <span class="class"><span class="keyword">struct</span> <span class="title">sk_buff</span> *<span class="title">reply</span>;</span></span><br><span class="line"> <span class="class"><span class="keyword">struct</span> <span class="title">vport</span> *<span class="title">vport</span>;</span></span><br><span class="line"> <span class="class"><span class="keyword">struct</span> <span class="title">datapath</span> *<span class="title">dp</span>;</span></span><br><span class="line"> u32 port_no;</span><br><span class="line"> <span class="keyword">int</span> err;</span><br><span class="line"></span><br><span class="line"> err = -EINVAL;</span><br><span class="line"> <span class="keyword">if</span> (!a[OVS_VPORT_ATTR_NAME] || !a[OVS_VPORT_ATTR_TYPE] ||</span><br><span class="line"> !a[OVS_VPORT_ATTR_UPCALL_PID])</span><br><span class="line"> <span class="keyword">goto</span> <span class="built_in">exit</span>;</span><br><span class="line"></span><br><span class="line"> ovs_lock();</span><br><span class="line"> dp = get_dp(sock_net(skb->sk), ovs_header->dp_ifindex);</span><br><span class="line"> err = -ENODEV;</span><br><span class="line"> <span class="keyword">if</span> (!dp)</span><br><span class="line"> <span class="keyword">goto</span> exit_unlock;</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (a[OVS_VPORT_ATTR_PORT_NO]) {</span><br><span class="line"> port_no = nla_get_u32(a[OVS_VPORT_ATTR_PORT_NO]);</span><br><span class="line"></span><br><span class="line"> err = -EFBIG;</span><br><span class="line"> <span class="keyword">if</span> (port_no >= DP_MAX_PORTS)</span><br><span class="line"> <span class="keyword">goto</span> exit_unlock;</span><br><span class="line"></span><br><span class="line"> vport = ovs_vport_ovsl(dp, port_no);</span><br><span class="line"> err = -EBUSY;</span><br><span class="line"> <span class="keyword">if</span> (vport)</span><br><span class="line"> <span class="keyword">goto</span> exit_unlock;</span><br><span class="line"> } <span class="keyword">else</span> {</span><br><span class="line"> <span class="keyword">for</span> (port_no = <span class="number">1</span>; ; port_no++) {</span><br><span class="line"> <span class="keyword">if</span> (port_no >= DP_MAX_PORTS) {</span><br><span class="line"> err = -EFBIG;</span><br><span class="line"> <span class="keyword">goto</span> exit_unlock;</span><br><span class="line"> }</span><br><span class="line"> vport = ovs_vport_ovsl(dp, port_no);</span><br><span class="line"> <span class="keyword">if</span> (!vport)</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> parms.name = nla_data(a[OVS_VPORT_ATTR_NAME]);</span><br><span class="line"> parms.type = nla_get_u32(a[OVS_VPORT_ATTR_TYPE]);</span><br><span class="line"> parms.options = a[OVS_VPORT_ATTR_OPTIONS];</span><br><span class="line"> parms.dp = dp;</span><br><span class="line"> parms.port_no = port_no;</span><br><span class="line"> parms.upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]);</span><br><span class="line"></span><br><span class="line"> vport = new_vport(&parms);</span><br><span class="line"> err = PTR_ERR(vport);</span><br><span class="line"> <span class="keyword">if</span> (IS_ERR(vport))</span><br><span class="line"> <span class="keyword">goto</span> exit_unlock;</span><br><span class="line"></span><br><span class="line"> err = <span class="number">0</span>;</span><br><span class="line"> <span class="keyword">if</span> (a[OVS_VPORT_ATTR_STATS])</span><br><span class="line"> ovs_vport_set_stats(vport, nla_data(a[OVS_VPORT_ATTR_STATS]));</span><br><span class="line"></span><br><span class="line"> reply = ovs_vport_cmd_build_info(vport, info->snd_portid, info->snd_seq,</span><br><span class="line"> OVS_VPORT_CMD_NEW);</span><br><span class="line"> <span class="keyword">if</span> (IS_ERR(reply)) {</span><br><span class="line"> err = PTR_ERR(reply);</span><br><span class="line"> ovs_dp_detach_port(vport);</span><br><span class="line"> <span class="keyword">goto</span> exit_unlock;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> ovs_notify(reply, info, &ovs_dp_vport_multicast_group);</span><br><span class="line"></span><br><span class="line">exit_unlock:</span><br><span class="line"> ovs_unlock();</span><br><span class="line"><span class="built_in">exit</span>:</span><br><span class="line"> <span class="keyword">return</span> err;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<ul>
<li>這邊會呼叫 <strong>new_vport</strong></li>
</ul>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/* Called with ovs_mutex. */</span></span><br><span class="line"><span class="function"><span class="keyword">static</span> struct vport *<span class="title">new_vport</span><span class="params">(<span class="keyword">const</span> struct vport_parms *parms)</span></span></span><br><span class="line"><span class="function"></span>{</span><br><span class="line"> <span class="class"><span class="keyword">struct</span> <span class="title">vport</span> *<span class="title">vport</span>;</span></span><br><span class="line"></span><br><span class="line"> vport = ovs_vport_add(parms);</span><br><span class="line"> <span class="keyword">if</span> (!IS_ERR(vport)) {</span><br><span class="line"> <span class="class"><span class="keyword">struct</span> <span class="title">datapath</span> *<span class="title">dp</span> = <span class="title">parms</span>-><span class="title">dp</span>;</span></span><br><span class="line"> <span class="class"><span class="keyword">struct</span> <span class="title">hlist_head</span> *<span class="title">head</span> = <span class="title">vport_hash_bucket</span>(<span class="title">dp</span>, <span class="title">vport</span>-><span class="title">port_no</span>);</span></span><br><span class="line"></span><br><span class="line"> hlist_add_head_rcu(&vport->dp_hash_node, head);</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> vport;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<ul>
<li>這邊會呼叫 <strong>ovs_vport_add</strong></li>
</ul>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line"><span class="function">struct vport *<span class="title">ovs_vport_add</span><span class="params">(<span class="keyword">const</span> struct vport_parms *parms)</span></span></span><br><span class="line"><span class="function"></span>{</span><br><span class="line"> <span class="class"><span class="keyword">struct</span> <span class="title">vport</span> *<span class="title">vport</span>;</span></span><br><span class="line"> <span class="keyword">int</span> err = <span class="number">0</span>;</span><br><span class="line"> <span class="keyword">int</span> i;</span><br><span class="line"></span><br><span class="line"> <span class="keyword">for</span> (i = <span class="number">0</span>; i < ARRAY_SIZE(vport_ops_list); i++) {</span><br><span class="line"> <span class="keyword">if</span> (vport_ops_list[i]->type == parms->type) {</span><br><span class="line"> <span class="class"><span class="keyword">struct</span> <span class="title">hlist_head</span> *<span class="title">bucket</span>;</span></span><br><span class="line"></span><br><span class="line"> vport = vport_ops_list[i]->create(parms);</span><br><span class="line"> <span class="keyword">if</span> (IS_ERR(vport)) {</span><br><span class="line"> err = PTR_ERR(vport);</span><br><span class="line"> <span class="keyword">goto</span> out;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> bucket = hash_bucket(ovs_dp_get_net(vport->dp),</span><br><span class="line"> vport->ops->get_name(vport));</span><br><span class="line"> hlist_add_head_rcu(&vport->hash_node, bucket);</span><br><span class="line"> <span class="keyword">return</span> vport;</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> err = -EAFNOSUPPORT;</span><br><span class="line"></span><br><span class="line">out:</span><br><span class="line"> <span class="keyword">return</span> ERR_PTR(err);</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<ul>
<li>這邊會執行 <strong>vport_ops_list[i]->create(parms)</strong></li>
</ul>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/* List of statically compiled vport implementations. Don't forget to also</span></span><br><span class="line"><span class="comment"> * add yours to the list at the bottom of vport.h. */</span></span><br><span class="line"><span class="keyword">static</span> <span class="keyword">const</span> <span class="class"><span class="keyword">struct</span> <span class="title">vport_ops</span> *<span class="title">vport_ops_list</span>[] = {</span></span><br><span class="line"> &ovs_netdev_vport_ops,</span><br><span class="line"> &ovs_internal_vport_ops,</span><br><span class="line"><span class="meta">#<span class="meta-keyword">if</span> IS_ENABLED(CONFIG_NET_IPGRE_DEMUX)</span></span><br><span class="line"> &ovs_gre_vport_ops,</span><br><span class="line"> &ovs_gre64_vport_ops,</span><br><span class="line"><span class="meta">#<span class="meta-keyword">endif</span></span></span><br><span class="line"> &ovs_vxlan_vport_ops,</span><br><span class="line"> &ovs_lisp_vport_ops,</span><br><span class="line">};</span><br><span class="line">``` </span><br><span class="line"></span><br><span class="line">- 假設是個netdev的port,就會執行 **ovs_netdev_vport_ops**裡面的create</span><br><span class="line"></span><br><span class="line">``` c</span><br><span class="line"></span><br><span class="line"><span class="keyword">const</span> <span class="class"><span class="keyword">struct</span> <span class="title">vport_ops</span> <span class="title">ovs_netdev_vport_ops</span> = {</span></span><br><span class="line"> .type = OVS_VPORT_TYPE_NETDEV,</span><br><span class="line"> .create = netdev_create,</span><br><span class="line"> .destroy = netdev_destroy,</span><br><span class="line"> .get_name = ovs_netdev_get_name,</span><br><span class="line"> .send = netdev_send,</span><br><span class="line">};</span><br></pre></td></tr></table></figure>
<ul>
<li>這時候就會執行 <strong>netdev_create</strong></li>
</ul>
<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">static</span> struct vport *<span class="title">netdev_create</span><span class="params">(<span class="keyword">const</span> struct vport_parms *parms)</span></span></span><br><span class="line"><span class="function"></span>{</span><br><span class="line"> <span class="class"><span class="keyword">struct</span> <span class="title">vport</span> *<span class="title">vport</span>;</span></span><br><span class="line"> <span class="class"><span class="keyword">struct</span> <span class="title">netdev_vport</span> *<span class="title">netdev_vport</span>;</span></span><br><span class="line"> <span class="keyword">int</span> err;</span><br><span class="line"></span><br><span class="line"> vport = ovs_vport_alloc(<span class="keyword">sizeof</span>(struct netdev_vport),</span><br><span class="line"> &ovs_netdev_vport_ops, parms);</span><br><span class="line"> <span class="keyword">if</span> (IS_ERR(vport)) {</span><br><span class="line"> err = PTR_ERR(vport);</span><br><span class="line"> <span class="keyword">goto</span> error;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> netdev_vport = netdev_vport_priv(vport);</span><br><span class="line"></span><br><span class="line"> netdev_vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), parms->name);</span><br><span class="line"> <span class="keyword">if</span> (!netdev_vport->dev) {</span><br><span class="line"> err = -ENODEV;</span><br><span class="line"> <span class="keyword">goto</span> error_free_vport;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="keyword">if</span> (netdev_vport->dev->flags & IFF_LOOPBACK ||</span><br><span class="line"> netdev_vport->dev->type != ARPHRD_ETHER ||</span><br><span class="line"> ovs_is_internal_dev(netdev_vport->dev)) {</span><br><span class="line"> err = -EINVAL;</span><br><span class="line"> <span class="keyword">goto</span> error_put;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> rtnl_lock();</span><br><span class="line"> err = netdev_master_upper_dev_link(netdev_vport->dev,</span><br><span class="line"> get_dpdev(vport->dp));</span><br><span class="line"> <span class="keyword">if</span> (err)</span><br><span class="line"> <span class="keyword">goto</span> error_unlock;</span><br><span class="line"></span><br><span class="line"> err = netdev_rx_handler_register(netdev_vport->dev, netdev_frame_hook,</span><br><span class="line"> vport);</span><br><span class="line"> <span class="keyword">if</span> (err)</span><br><span class="line"> <span class="keyword">goto</span> error_master_upper_dev_unlink;</span><br><span class="line"></span><br><span class="line"> dev_set_promiscuity(netdev_vport->dev, <span class="number">1</span>);</span><br><span class="line"> netdev_vport->dev->priv_flags |= IFF_OVS_DATAPATH;</span><br><span class="line"> rtnl_unlock();</span><br><span class="line"></span><br><span class="line"> netdev_init();</span><br><span class="line"> <span class="keyword">return</span> vport;</span><br><span class="line"></span><br><span class="line">error_master_upper_dev_unlink:</span><br><span class="line"> netdev_upper_dev_unlink(netdev_vport->dev, get_dpdev(vport->dp));</span><br><span class="line">error_unlock:</span><br><span class="line"> rtnl_unlock();</span><br><span class="line">error_put:</span><br><span class="line"> dev_put(netdev_vport->dev);</span><br><span class="line">error_free_vport:</span><br><span class="line"> ovs_vport_free(vport);</span><br><span class="line">error:</span><br><span class="line"> <span class="keyword">return</span> ERR_PTR(err);</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
<ul>
<li>這邊會調用 <strong> dev_get_by_name </strong> 用該name取得對應的device.</li>
<li>調用 <strong> netdev_rx_handler_register </strong> 註冊 rx handler.</li>
<li></li>
</ul>
<p>userspace side:</p>
</div>
<div class="popular-posts-header">Related Posts</div>
<ul class="popular-posts">
<li class="popular-posts-item">
<div class="popular-posts-title"><a href="/openvswitch-source-code3.html" rel="bookmark">OpenvSwitch source code(3)</a></div>
</li>
<li class="popular-posts-item">
<div class="popular-posts-title"><a href="/openvswitch-hmap.html" rel="bookmark">OpenvSwitch - hmap</a></div>